68691590272638 has 12 divisors (see below), whose sum is σ = 148831778924088. Its totient is φ = 22897196757540.

The previous prime is 68691590272567. The next prime is 68691590272667. The reversal of 68691590272638 is 83627209519686.

It is a happy number.

68691590272638 is a `hidden beast` number, since 6 + 8 + 6 + 9 + 1 + 590 + 2 + 7 + 26 + 3 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1908099729778 + ... + 1908099729813.

It is an arithmetic number, because the mean of its divisors is an integer number (12402648243674).

Almost surely, 2^{68691590272638} is an apocalyptic number.

68691590272638 is an abundant number, since it is smaller than the sum of its proper divisors (80140188651450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68691590272638 is a wasteful number, since it uses less digits than its factorization.

68691590272638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3816199459599 (or 3816199459596 counting only the distinct ones).

The product of its (nonzero) digits is 470292480, while the sum is 72.

The spelling of 68691590272638 in words is "sixty-eight trillion, six hundred ninety-one billion, five hundred ninety million, two hundred seventy-two thousand, six hundred thirty-eight".